Changing Filter Context in Measure

Hi phjz ,

Please have a try.

YTD Actuals Average = 
VAR CurrentYear = MAX(Calendar[Year])
VAR LastDate = MAX(Calendar[Date])
RETURN
AVERAGEX(
    FILTER(
        SUMMARIZE('Calendar', Calendar[Year], Calendar[Date], "WeekActuals", [Actuals]),
        Calendar[Year] = CurrentYear && Calendar[Date] <= LastDate
    ),
    [WeekActuals]
)

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Community Support Team _ Rongtie

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this works perfectly - thank you so much!